Holemaker 16Pc Cobalt Holesaw Set Plumbers AWP1420 Drill steel 13 8 Size:Adapters Drill steel 13 8 mm Use them to create a dry comfortable seating area 16 Piece Set Includes:• 1 x UN100 016 16mm (5 8 )• 1 x UN100 019 19mm (3 4 )• 1 x UN100 022 22mm (7 8 )• 1 x UN100 025 25mm (1 )• 1 x UN100 030 30mm (1 3 16 )• 1 x UN100 035 35mm (1 3 8 )• 1 x UN100 044 44mm (1 3 4 )• 1 x UN100 051 51mm (2 )• 1 x UN100 057 57mm (2 1 4 )• 1 x UN100 073 73mm (2 7 8 )• 1 x UN100 092 92mm (3 5 8 )• 1 x UN100 114 114mm (4 1 2 )• 1 x UN102 125 11 32 Arbor• 1 x UN102 140 7 16 Arbor• 1 x UN102 145 Arbor Thread Adaptor• 1 x UN102 100 12 Extention Bar Suitable for drilling a wide range of materials includingsteel aluminium brass cast iron plastics & wood